By Paul Broadbent
By Murray Brennan
By L.J. Frobisher
By Unidentified Author, Kent County Council
By Scottish Primary Maths Group SPMG
By Margaret Gronow
By Various
By Serena Alexander, David Hillard
By CGP Books
By Ginn, Merttens, Ruth, Kirkby, David
By Diyan Leake
By Levesley, Mark
By Davidson, Avelyn
By Lessac Frane
By School Mathematics Project
By Peter Kaner, etc.
By Keith Pledger, Joe Petran, Gareth Cole
By Eric Carle
By Brenda Keogh, John Dabell, Stuart Naylor, Ged Mitchell
By Union Square & Co. (Firm)
By Alice Hansen
By Peter Smith
By Hartman, Bob
By Rose Griffiths
By David Clemson, Wendy Clemson
By Jillian Harker, Geraldine Taylor, John Dillow